4 Cho ln(alpha) = - 5/13, Pi

Question

4 Cho ln(alpha) = - 5/13, Pi < alpha < (3pi)/2 * Tinh * ln(alpha); cho * tan x ^ 2 = - 3 Tính Chos alpha= 1 5; TaRssin( pi- alpha); Che * sin alpha = 1/3 312 Ti

Answer

=1- 1 1- 25 165 = 144 169 [ matrix 105 alpha= 12 15   60s alpha=- 12 15   60s alpha=- 12 11 matrix; alpha in( pi: 3 pi 2 ) cos alpha<c Rightarrow cos alpha=- 12 13; tan alpha* cot

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